How to remove & add a Program using PowerShell command

I'll need to uninstall a software agent on a mass scale (thousands) & then install with another version
as doing so one by one is not feasible.

I have a way to send "Remote PowerShell" commands (though I could send Windows batch ie .bat
commands too but often this run into errors) to the various Windows servers.  Below is the
output of sc queryex of the service & attached the software name (which is an msi file ie uninstall
Agent-Windows-8.0.0-1732.x86_64.msi, Agent-Windows-9.0.0-2004.x86_64.msi
& then reinstall with Agent-Windows-9.0.0-5001.x86_64.msi  )

sc queryex ds_agent

SERVICE_NAME: ds_agent
        TYPE               : 10  WIN32_OWN_PROCESS
        STATE              : 4  RUNNING
                                (STOPPABLE, NOT_PAUSABLE, ACCEPTS_SHUTDOWN)
        WIN32_EXIT_CODE    : 0  (0x0)
        SERVICE_EXIT_CODE  : 0  (0x0)
        CHECKPOINT         : 0x0
        WAIT_HINT          : 0x0
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sunhuxAuthor Commented:
The installation process will prompt for administrator password & asks to
to confirm to proceed
FOXActive Directory/Exchange EngineerCommented:
I would use psexec with the bat file that you have.  You can run the psexec command against a list of machines inputting your username and password one time and it will hit all those machines with the credentials
FOXActive Directory/Exchange EngineerCommented:
put your machinenames in a notepad one beneath the other then name the file with a .txt extenstion
download the pstools to your machine.  cd to the pstools directory that has psexec then run the below

PsExec.exe @\\pathtofilewhosts.txt -u domain\user -p password -c \\pathtobatchfile.txt

(pathtofilewithhosts.txt is the location and filename of your machines)
(pathtobatchfile.txt is the location and filename of your bat file) edit the names to match your scenario

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sunhuxAuthor Commented:
Have used psexec before;  challenge is the installation process will prompt to
confirm to proceed & other prompting
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